Altera Nios II C2H Compiler - Manual (Page 48)

3–8 9.1 Altera Corporation
Nios II C2H Compiler User Guide November 2009
One-to-One C-to-Hardware Mapping
Figure 3–5. if Logic Without else
Conditional Operator ?:
The ?: (conditional) operator is functionally equivalent to the if-else
statement, but the placement of registers is different. The condition logic
and selection logic compute in the same clock cycle, and the result is
registered.